upstream/mercurial-mirror Files · mercurial/node.py

dirstate-v2: add check of parent/child nodes being related when writing...

dirstate-v2: add check of parent/child nodes being related when writing This stems from a corruption seen in a private repository. We're not sure of the source of the corruption, and it's very possible that we're seeing compounded effects of multiple writes on a corrupted dirstate. Adding this check is not expensive in itself and large writes of the dirstate are not common. This change does not catch this problem at the root node, the next one will.

Manuel Jacob - - Load All Authors

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      # node.py - basic nodeid manipulation for mercurial

      #

      # Copyright 2005, 2006 Olivia Mackall <olivia@selenic.com>

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      import binascii

      # This ugly style has a noticeable effect in manifest parsing

      hex = binascii.hexlify

      bin = binascii.unhexlify

      def short(node):

          return hex(node[:6])

      nullrev = -1

      # pseudo identifier for working directory

      # (experimental, so don't add too many dependencies on it)

      wdirrev = 0x7FFFFFFF

      class sha1nodeconstants:

          nodelen = 20

          # In hex, this is '0000000000000000000000000000000000000000'

          nullid = b"\0" * nodelen

          nullhex = hex(nullid)

          # Phony node value to stand-in for new files in some uses of

          # manifests.

          # In hex, this is '2121212121212121212121212121212121212121'

          newnodeid = b'!!!!!!!!!!!!!!!!!!!!'

          # In hex, this is '3030303030303030303030303030306164646564'

          addednodeid = b'000000000000000added'

          # In hex, this is '3030303030303030303030306d6f646966696564'

          modifiednodeid = b'000000000000modified'

          wdirfilenodeids = {newnodeid, addednodeid, modifiednodeid}

          # pseudo identifier for working directory

          # (experimental, so don't add too many dependencies on it)

          # In hex, this is 'ffffffffffffffffffffffffffffffffffffffff'

          wdirid = b"\xff" * nodelen

          wdirhex = hex(wdirid)

      # legacy starting point for porting modules

      nullid = sha1nodeconstants.nullid

      nullhex = sha1nodeconstants.nullhex

      newnodeid = sha1nodeconstants.newnodeid

      addednodeid = sha1nodeconstants.addednodeid

      modifiednodeid = sha1nodeconstants.modifiednodeid

      wdirfilenodeids = sha1nodeconstants.wdirfilenodeids

      wdirid = sha1nodeconstants.wdirid

      wdirhex = sha1nodeconstants.wdirhex

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				# node.py - basic nodeid manipulation for mercurial
				#
				# Copyright 2005, 2006 Olivia Mackall <olivia@selenic.com>
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.


				import binascii

				# This ugly style has a noticeable effect in manifest parsing
				hex = binascii.hexlify
				bin = binascii.unhexlify


				def short(node):
				return hex(node[:6])


				nullrev = -1

				# pseudo identifier for working directory
				# (experimental, so don't add too many dependencies on it)
				wdirrev = 0x7FFFFFFF


				class sha1nodeconstants:
				nodelen = 20

				# In hex, this is '0000000000000000000000000000000000000000'
				nullid = b"\0" * nodelen
				nullhex = hex(nullid)

				# Phony node value to stand-in for new files in some uses of
				# manifests.
				# In hex, this is '2121212121212121212121212121212121212121'
				newnodeid = b'!!!!!!!!!!!!!!!!!!!!'
				# In hex, this is '3030303030303030303030303030306164646564'
				addednodeid = b'000000000000000added'
				# In hex, this is '3030303030303030303030306d6f646966696564'
				modifiednodeid = b'000000000000modified'

				wdirfilenodeids = {newnodeid, addednodeid, modifiednodeid}

				# pseudo identifier for working directory
				# (experimental, so don't add too many dependencies on it)
				# In hex, this is 'ffffffffffffffffffffffffffffffffffffffff'
				wdirid = b"\xff" * nodelen
				wdirhex = hex(wdirid)


				# legacy starting point for porting modules
				nullid = sha1nodeconstants.nullid
				nullhex = sha1nodeconstants.nullhex
				newnodeid = sha1nodeconstants.newnodeid
				addednodeid = sha1nodeconstants.addednodeid
				modifiednodeid = sha1nodeconstants.modifiednodeid
				wdirfilenodeids = sha1nodeconstants.wdirfilenodeids
				wdirid = sha1nodeconstants.wdirid
				wdirhex = sha1nodeconstants.wdirhex